<?php
class Search_model extends my_model{

  function __construct(){

    parent::__construct();
    $this->_prefix = "sea";
    $this->_column = array(
                'id'          =>$this->_prefix."_id",
                'keyword'     =>$this->_prefix."_keyword",
                'count'       =>$this->_prefix."_count"
      );
  }

}

?>